<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8"/>
    </head>
    <body>
        今天是星期：
        <form action="form.php" method="post"  >
            <select name="week" size="5" multiple="multiple">
                <option value="1">1</option>
                <option value="2">2</option>
                <option value="3">3</option>
                <option value="4">4</option>
                <option value="5">5</option>
                <option value="6">6</option>
                <option value="7">7</option>
            </select>
        </form>
    </body>
</html>